Dongguan Industrial Robotics
The following are some of the situations regarding the industrial automaton lens in Dongguan: ** 1. Common parameters of industrial lenses ** 1. ** Field of View (Field of View)** - This was the range that the image acquisition device could cover, which was the size of the object plane corresponding to the image on the target surface. 2. ** Working Distance ** - Generally, it refers to the distance from the front of the lens to the object being tested. The system generally cannot produce a clear image if it is less than the minimum working distance. 3. ** Aperture ** - It was expressed as F, measured by the ratio of the focal length of the lens f to the aperture D. Each lens was marked with a maximum F value. For example, 8mm/F1.4 represented a maximum aperture of 5.7mm. The lower the F value, the larger the aperture. The higher the F value, the smaller the aperture. 4. ** relative aperture ** - It refers to the ratio of the diameter of the entrance hole of the lens (expressed by D) to the focal length (expressed by f), namely D/f. 5. ** Maximum relative aperture ** - It was usually marked on the lens, such as 1:1.2 or f/1.2. 6. ** resolution ** - It was an important factor to evaluate the quality of the lens. It referred to the number of pairs of black and white stripes that the lens could distinguish in millimeters. 7. ** Focus ** - It refers to the distance from the principal point to the focal point, called the focal length of the optical system. It determines the ratio between the image and the actual object. In the case of a fixed object distance, to get a large proportion of the image, it was necessary to choose a long focal length lens. 8. ** Depth of Field ** - It refers to the range where the image is still clear within a certain distance before and after the object is focused. The depth of field varied with the aperture, focal length, and shooting distance of the lens. The larger the aperture, the smaller the depth of field, and the smaller the aperture, the greater the depth of field. The longer the focal length, the smaller the depth of field, and the shorter the focal length, the greater the depth of field. The closer he was to the subject, the smaller the depth of field, and the further away he was from the subject, the greater the depth of field. 9. ** Aperture ** - The numerical aperture is equal to the product of the index of refraction n of the medium between the object and the objective lens and the sin of half the aperture angle of the objective lens (a/2). The calculation formula is N.A = n*sin a/2. The numerical aperture was closely related to other optical parameters. It was directly proportional to the resolution and the amplification rate. In other words, the numerical aperture directly determined the resolution of the lens. The larger the numerical aperture, the higher the resolution. 10. ** Physical Interface ** - The physical interface of the lens referred to the physical interface between the lens and the camera. The common interface forms of industrial lenses were C port, CS port, F port, etc. Among them, C/CS was an international standard interface specifically used in the industrial field. ** 2. Usage of industrial lenses ** 1. ** Quality Inspection ** - On a high-speed assembly line, it could be used to check whether the screw holes were aligned, whether the bottle cap was closed properly, and whether there were any missing parts. It could instantly inspect a large number of products and efficiently identify defective products. This required the industrial lens to maintain high resolution at all corners, and the images taken at any shooting distance and field of view must be clear. 2. ** As the "eyes" of robots and AI ** - The industrial camera was not only a good helper for the quality control of the factory production line, but it could also be used as the eyes of robots and AI to understand the world. ** 3. Liquid lens technology application in industrial lenses (possible technological developments related to Dongguan)** 1. ** Liquid lens technology principle ** - A liquid lens was an optical component made of one or more liquids without mechanical connections. The optical parameters (focal length, radius of curvature, etc.) of the optical component could be changed by external control. Currently, there were two main technical routes for the commercial mass production of liquid lenses: dual-liquid electrowetting lenses and liquid-filled lenses. 2. ** The application advantage in machine vision ** - In machine vision applications, the use of traditional high f/#lenses would cause problems such as reduced aperture, reduced resolution, and extended exposure time due to increased depth of field. The use of the liquid lens allowed the lens to be focused with a more compact optical structure, and it had a millisecond-level adjustment speed. It was faster and more durable than the traditional lens with a purely mechanical translation lens structure, and there was no need to consider the problem of depth of field. For example, in a fast-moving assembly line and a bar code detection scene with multiple prospects and backgrounds, traditional mechanical lenses would have many inconveniences. However, the liquid lens could be used to adjust the radius of curvature of the liquid lens when the object distance changed. Similarly, when the telekinetic lens was used to fix the object distance to detect the size, if the object distance changed beyond the depth of field, the traditional lens needed to adjust the working distance, while the telekinetic lens equipped with a liquid lens could achieve a single lens multi-object distance size detection without adjusting the lens position. ** IV. Status of relevant enterprises in Dongguan ** 1. ** Primes ** - Primus was a core product supplier of machine vision and industrial automaton in Dongguan. Its main products included industrial lenses, industrial cameras, visual light sources, image measuring instruments, machine vision inspection systems, etc. For example, there was a 5-million-pel industrial lens with a resolution of 5 million: 160lq/mm(center) 100lq/mm(periphery), focal length 12mm, aperture range F1.6 - F22, interface C, filter size M52.0x0.72mm, and other parameters. 2. ** DongGuan Le Shi Automatic Technology Co., Ltd. ** - The company was founded in 2011, focusing on machine vision light sources, such as linear light sources, line scan light sources, and many other types of machine vision LED light sources. Although it is not directly producing industrial automatic lenses, it can provide matching light source products for the application of industrial lenses in machine vision inspection systems. Read more exciting novels for free
Does the slight shift of the camera affect the photo?
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Master student, Institute of Artificial Intelligence, Jinan University
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